GSP just updated the forecast..
The 11 am advisory from NHC has forced some changes and upgrades
to the forecast. The latest track takes the storm center over the
western Piedmont early Saturday morning as it is weakening from
a Tropical Storm to a Depression. The problem is the expanded
wind field as the storm interacts with a surface boundary and
the pressure gradient ahead of that boundary as it moves back
north. Indications are that during the daytime on Friday, stronger
wind gusts upwards of 45 to 55 mph may lift northward across the
I-77 corridor through the afternoon and evening...well ahead of
the center of circulation. After coordination with neighboring
offices, the decision was made to issue a Tropical Storm Warning
because the chances of getting Tropical Storm force wind gusts is
roughly 50 pct or higher along/east of a line from roughly Chester
to York, Lincolton, and Statesville. The strongest winds would be
Friday afternoon and evening. The areas west of the Tropical Storm
Warning will likely get an Advisory on the next issuance later this
afternoon. A Flood Watch will probably also be issued for part of
the fcst area with the heavier rain developing Friday morning.